Razor-blade-stropping device.



Patented July 20, 1909.

ANDREW. s. GRAHAM nmyuuo-umouawnERS. wAsmNGYcN. n. c

OTTO KAMPFE, or New YORK, N. Y.

RAZOR-BLADE-STROPPING DEVICE.

Specification of Letters Patent.

Patented July 20, 1909.

Application yiiled August 24, 1908. Serial No. 450,030.

To all whom it may concern:

Be it known that I, OTTO KAMPFE, a citizen of the United States of America, residing in the borough of Brooklyn, county of Kings, city-and State of New York, have invented an Improvement in RaZor-Blade-Stropping Devices, oi which the following is a specification.

My present invention is designed as an improvement upon the razor blade stropping devices heretofore invented and used by F. It. and O. Kample, and particularly the devices of U. S. Letters Patent #725,449, of April 14, 1903; 11761696, of August 16, 1904, $658,649, ol' September 25, 1900, and Re-issue $12,164, of October 27, 1903, with the object of simplifying and making less expensive the stropping device and at the samel time so placing the razor edge upon the strop that the part sharpened will be longer and more tapering than has been the case with said previous devices.

In the device of said Patents #725,449 and #767,696, rollers lying against the strop and gears connected thereto and operated thereby were employed to turn the blade holder, normally out of contact with the strop, and the blade held thereby so as to bring the edge to be sharpened down against the strop, with the stroke applied in opposite directions, consequently the strop drew straight be-' tween the rollers.

y In the device of Patents #658,649 and Reissue lvk12,164, there were no guiding and actuating rollers or gears operated thereby and the blade holder alone rested upon the strop and was by the pressure applied and the stropping movement in opposite directions turned over to bring the opposite blade edges into position on the strop.

In the latter devices and in the absence ol guiding control the edge oi. the blade was liable to be sharpened rounding instead of iat, and the object ol my present invention is to obviate this dilliculty in an inexpensive stropping device where the strop is guided at either stropping side or at both sides according to the pressure applied.

In the device of my present invention I employ a frame, a pivot rod ulcrumed at its inner end to the frame, a pinion on the pivot rod engaging a se mental rack on the frame, and means for ho ding the pinion in engagement with the rack against the tendency of the stropping action to separate said parts,

and I'prefer to place the blade holder at an obtuse angle of inclination to the aXis of the pivot rod.

The essential features of my invention reside in a bent oneiece wire frame with rest bars and a blade older out of line with the rest bars of the frame so that when the baclr of the blade holder rests upon the surface of the strop, the latter is in a plane appreciably below the plane passing through the rest bars or touching'the lower edges of the same, consequently in the act of stropping the blade, either the blade holder and one rest bar will bear at a time upon the strop according to the direction of movement, or the strop will assume a curve between the rest bars and touching upon the lrest bars and the blade holder, with the result in either instance that more of the edge of the razor blade will rest upon the stropthan has heretofore been the case in the aforesaid devices, and a tapering rather than a blunt edge will be made 1n the act of sharpening.

In the drawing, Figure 1 is a plan representing the device of my improvement. Fig. 2 is a longitudinal section and elevation on the dotted line x, of Fig. 1, and in which the blade holder and blade are shown as in an upright position.V Fig.r 3 is a cross section and elevation at the dotted line y, y, Fig. 1. Fig. 4 is a section and partial elevation in larger size through the blade holder and the revoluble parts connected therewith and the pivot rod. Fig. 5 isla diagrammatic cross section at about the dotted line z, z, of Fig. 1. Fig. 6 is a cross section in larger size also 'at about the dotted line z, z, of Fig. 1, showing the relation of the blade holder and blade with the rest bars in the operation of sharpening the blade.

The frame of the razor blade stropping device of my present invention is preferably formed of Wire in one piece comprising the bent in-turned pivot center a, the diverging arms a1 a1 extending therefrom, the finger loops a2 a2 and the diverging rest bars a3 a3. The bent form given to this frame. imparts rigidity and stiiness, the same being held together as between the members al and the loops a2 by a plate e on which is mounted the segmental rack d; the plate having rounded ends e1 which engage similar parts y ofthe wire frame and entend across between said parts.

b is a pivot rod fulcrumed at b1 in the bent sov pivot-:center 'af1 ofthe wirebframmand lIvpr'efer to em'ploy a metal cup plate b2 over'the pivot or fulcrum b1 of the rod b which is formed with oppositely extending 'strap` memb'ers passing around the membersuof..,the..wire.

frame and so held in positiongthis cup member forming a rest for one or more fingers of the` hand? in grasping* the stropping" imple# ment. The rod b is proyidzediwithfa sl'eelve 2 forming a stop for the sleeve 3 wh1ch-eX .tendsfbetween ,the/.sleeve 21 and :the: head. L or `.up=set .end of Ithe .rod b.

On the sleeve 3 there is a pinion' cmeshing `with.,thesfgmentalrack dfonwthe .plate e,

and c1, is a .ring orK annulusfsurroundingmthe .fsleeye 3 andlthebladeholder jf and .employed ...as a. Oras` a meanssof receiving. a ypin ,by .which .the sleeve 3: andabaseof. the Vblade holder f are 'connectedsoas-.to fturntogether.

.l Preferably formed with andextending.- out from. .the sleeve 2 .is an. arm 5-Whichv--passes .across the .edge of the, plate. e and. oniits xfree :end-.is fcormected` avroller. 6 bearingpponuthe ...under andouter surfacefoffthe ,plate caper- .forming the double `function L of y maintaining .in .the str opping. act wouldbeteseparate the pinion from ,the segmental` rack. e

. Ithave shown yand-preferito so -connectfthe 'i blade holder f .to the ysleeve 3 @that ,thesame Vwith theblade h will occupy an. obtuse" angle of` inclination,` .to they aXis.-.of- ,ithe 'pivot rod;

. .thesameas has beenshown.and:I describeddri -v the aforesaid "Patentsr 658,649... :and .\Reissuef 12,164, Ibut-lf do -notflimitiimyself r:in the present. instance to .such construction.

@blade h'oldercomes bfelow.the. line of the `rest` k bars a3. This is' especially. apparent from Fig.. 5.inwhich a partofathe-.strpp i isshown ,with .the bladeholderfbearin'g thereonand the l-rest barsa3 as occupying; aplaneparallel to'` but appreciablyabove .the planezof the strop, andy infthe operation. ofthei device,y thief ybearingof the .bladeiholderinpon thestrpp; .with the. .movement in gopposite;l directions causes the blade holderto iturnuwer.from .side-to. side. rlfhis turning'L-movement rotates thepinion c and thefsleeye-S around'ther-od l) over .the surface of. the segmentallrack i d .from the proximity. 1to ay restbarY on .oneside with .the movement back- :and -forth oft-the .asfshown in Eig. 1to the-xpppositefproximity y.blade along the'r surface ofthe strop. -In-this operation itwill be; substantially impossible 1 to maintain the.relation..of.the partsshown dn 5 :because the. strop will .Yeithenbend f around .the bladeholder. and scomein'contact with the two \rest.`bars.-.as,shownin lllig. 6*,or Atheystrop-will yield-so Yas to touch one irest bar and blade holder at a time. Withfeither .65,01 these .positions .the-.same .function is `performed and the"samejirelatinmmaintained of the blade to the surface of the stropn upon which it rests. This is shown in Fig. 6.

- I am aware thatit is quite common in this ..art..to...place..ablade holder above a plane at "the periphery'f the rollers or rest bars, but in this instance the acute angle. produced by the 'surface' of the strop and a` line 'through JtheL-:bladeg:isfgrreater than the acute angle produced by a line at the surface of the strop and through the.blafle.when thefbliadeiholder `Tests upon the-strop fas'sisfshown rin? Fig. 6. 'lhereforein .the old Y'way' :only ithe edge .of 'the blaclcxwas -touchedfby .the .strop,- whereas in ...the .newffway accordingfto.- Figa; 6, .an1.appre .ciable,-surface ofthe :razor [blade restssupon ...the strop so .that the.- surfaceelsharpenedewill be greater *in 'the new way and less in the-'old *wayi Withthe riesnltof` -aiblunt-iedge according. .to itheifoldi method ,-z and. a long tapering Y.edged acciording..*to` the new-way; thee-edge .producedbythe presentfimprovementbeing betterltaperingeedgei and more fitted..to.do itheworklthanf the `:edgev produced in thefold Way- I i 1 In. a .razor` bladestropping device, the combination with a framehaving restfbars, of', ca-.blade holder, the. reenter' of lwhichfis. be-

centersbf vthe rest bars.

2. In a razor strop deViceVthe combinai tion with ,a1 frame.' having: fres-tfba-rsf 'of a Y. blade .holder,. lthe. center.- bf i-which is onfy the stroppingside 'of ,thelframeat oneside off. a rplane passing 1through the vcenters of .the rest .barsfwhereby -the strop .in |use .liesf flat Ibey.tween either or botlif'of the restbars andthe blade holder.

-3 In a razor. blade.stropping devi-ce,` the lcombination with a fr-amehaving frest fbars, of a blade holder operatedfbetween:therest lbars f andi-occupying. a plane below an; opera- .tive v.plane pa-ss'ing-` :through the '..restdbarsl itherestbarsat aitimecontact with the strop iin. useiaccordilngtto the direction of move- .-ment.

4. In... ai [razor: blade .strppping device. a bent one-piecewire Aframe Kcomprising abent 'pivot/centen at one end,.withr'eturn members; diyergingf. members@ extending.'v thereifromi and endidi'vergingirest bars-Withfiinger loops\..betWe.en-. ,the f diverging-v members .and therestbars 5.1 lna'.- razon-blade.stroppingideviceaa .-bentonepiecewire frame comprising bent pivot center at onefendywitli return-inembergs,A -dixfergingcmembers extendingx there- V.from andy end.diverging-restbarsawith.iinger1 loops between: the diyerging members. .and .themrestA b.ars, ya plate. extending 'between .mem-bers of-.ithe bent frame andhaying're- .turn ends `.engaging .ltheframe-adj acent to .the

finger :loops.;A asegmentalrackbarvsecuredfto Alow an operativey .plane passing -throughlthdwhereby ithe blade .holder and. either .one of f a blade holder secured to said swinging rod,

the plate, a rod pivoted in the pivot center l the rest bars, a rod pivoted to the pivot cenv of the frame and adapted to swing, an arm and roller device secured to said rod crossing said plate and the roller bearing on the under surface thereof, a sleeve, a pinion and and the pinion engaging the segmental rack. 6. In a razor blade stroppng device, a bent one-piece Wire frame comprising a bent pivot center at one end, With return members, diverging members extending therei from and end diverging rest bars with finger I loops between the diverging members and ter of the said Wire frame and at its opposite end provided with devices for carrying the razor blade, and a cup plate over the pivot center of said rod acting as a shield to the hand or the fingers from Contact With the pivot center.

Signed by me this 14th day of August OTTO KAMPFE. Vitnesses:

ARTHUR H. SERRELL, E. ZAoHARIAsEN. 

